There is now a section in the downloads area for WOIN fan creations. You can upload your creations there to share them with others, and ensure there's an easy repository where people can find them (rather than searching across numerous forums, social media, and file-hosting services).

I have started it off by uploading two documents (d20/WOIN conversion guide; and rules for changing the size scale of starships to accommodate fighters and titans).

When you upload something there, a corresponding thread is automatically started here in the forum containing your upload description. You don't need to do both.

You can find the area here:

http://www.enworld.org/forum/rpgdown...?categoryid=42

(I am also linking to it from the Resources page on the official WOIN website).